Google last week acquired social search service Aardvark. The service lets users ask questions and get answers from other users in their social circle within minutes. Rather than integrate Aardvark directly into its core search results (how might that work, anyway?), Google put Aardvark into Google Labs, where it will arguably evolve and improve, thanks to access to millions of more eyeballs. But did you know that Google has several other experiments in search and other areas percolating in Google Labs? Some of them, such as Google Social Search, even graduate. See current Labs experiments here.